W6100 datasheet(109/149 Pages) WIZNET

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W6100 – Hardwired Dual TCP/IP Stack Controller

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These block bits must be set before Sn_CR[OPEN] command.

Sn_MR[MULTI]

Sn_MR[BRDB]

Sn_MR[UNIB]

Unicast

Multicast

Broadcast

Don’t Care

In UDP6 or UDPD mode, Solicited Multicast packet is blocked when Sn_MR[SMB] is set to ‘1’.

6.3.5.3

Port Unreachable Block

W6100 automatically transmits destination port unreachable packet to the sender when a

sender transmits a UDP packet to a port that didn’t open on W6100. But it could be a target

for port scan attack.

In UDP4 or UDP6, port unreachable packet is blocked by setting NET4MR[UNRB] = ‘1’ or

NET6MR[UNRB] = ‘1’.

6.4

IPRAW

IPRAW supports protocol communication shown in Table 7 among various upper protocols (Refer

to IANA_Protocol Numbers) defined in the internet protocol layer.

When SOCKET n is opened as IPRAW4 or IPRAW6, Sn_PNR configures the value of field or IPv6

extension header. SOCKET n cannot communicate by using a protocol different from the

protocol set in Sn_PNR.

Table 7 Internet Protocol supported in IPRAW Mode

Protocol

Number

Semantic

Support

HOPOPT

IPv6 Hop-by-Hop Option

ICMP

Internet Control Message Protocol

IGMP

Internet Group Management

IPv4

IPv4 encapsulation

TCP

Transmission Control

UDP

User Datagram

IPv6

IPv6 encapsulation

ICMP6

ICMP for IPv6

others

Other Protocols

W6100 Datasheet(PDF) 109 Page - WIZnet Co., Ltd

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